Why does my arm shake and turn bright red when I'm eating dirt? http://www.listsworld.com/wp-content/uploads/2012/11/good-question.jpg http://www.listsworld.co

Why does my arm shake and turn bright red when I'm eating dirt? http://www.listsworld.com/wp-content/uploads/2012/11/good-question.jpg http://www.listsworld.com/wp-content/uploads/2012/11/good-qu...